Class Field Theory
《Class Field Theory》 · 第 114 页 · Chapter 5，Section 5.3「The Baker–Campbell–Hausdorff Formula」，Theorem 5.3
Theorem 5.15.1. Let $N \ge p$. Then $\chi_{V_\lambda}(C_{\mathbf i})$ is the coefficient of $x^{\lambda+\rho} := \prod x_j^{\lambda_j+N-j}$ in the polynomial $\Delta(x)\prod_{m\ge 1} (\sum_j x_j^m)^{i_m}$.